package com.atguigu.gulimall.order.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @author lk
 * @version 1.0.0
 * @Description feign拦截器功能
 * @createTime 2024/3/6 11:16
 */

@Configuration
public class GuliFeignConfig {

    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor(){
        RequestInterceptor requestInterceptor = requestTemplate -> {
            //1、使用RequestContextHolder拿到刚进来的请求数据
            ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
            if(requestAttributes != null){
                //老请求
                HttpServletRequest oldRequest = requestAttributes.getRequest();
                if(oldRequest != null){
                    //2、同步请求头的数据（主要是cookie）
                    //把老请求的cookie值放到新请求上来，进行一个同步
                    String cookie = oldRequest.getHeader("Cookie");
                    requestTemplate.header("Cookie",cookie);
                }
            }
        };
        return requestInterceptor;
    }
}
